diff --git a/README.md b/README.md
index ae5cb60..ffbfa34 100644
--- a/README.md
+++ b/README.md
@@ -86,6 +86,15 @@ kicker-cli event open 351e00bf-025c-4243-b381-2f5a135c3070
 kicker-cli event delete 351e00bf-025c-4243-b381-2f5a135c3070
 ```
 
+Event analysis:
+```shell
+# analyze with "double_player_rank" operator for "byp" event order by ELO
+kicker-cli events analyze -m double_player_rank -t byp -o ELO
+
+# analyze with "single_player_rank" operator for "single" event order by win rate
+kicker-cli events analyze -m single_player_rank -t single --sort-by elo
+````
+
 Player management:
 ```shell
 # list players
diff --git a/cmd/kicker-cli/cmd/import.go b/cmd/kicker-cli/cmd/import.go
index c7ebb51..50c6b33 100644
--- a/cmd/kicker-cli/cmd/import.go
+++ b/cmd/kicker-cli/cmd/import.go
@@ -37,6 +37,10 @@ var importCmd = &cobra.Command{
 			return
 		}
 
+		var players []string
+		for _, p := range instance.Conf.Players {
+			players = append(players, p.Name)
+		}
 		eventsAdded := 0
 		for _, importPath := range args {
 			if strings.HasPrefix(importPath, "~") {
@@ -58,17 +62,39 @@ var importCmd = &cobra.Command{
 					}
 				}
 				if !found {
-					var needCreate bool
 					if !importEventCreateUnknownPlayers {
-						needCreate, _ = pterm.DefaultInteractiveConfirm.
-							WithDefaultText(fmt.Sprintf("Create a new player with name `%s`", p.Name)).
-							WithDefaultValue(true).
-							Show()
-					} else {
-						needCreate = true
-					}
-					if needCreate {
-						instance.AddPlayer(*entity.NewPlayer(p.Name))
+						text := fmt.Sprint("Unknown player: ", p.Name)
+						selectedOption, _ := pterm.
+							DefaultInteractiveSelect.
+							WithOptions([]string{
+								"Create a new player",
+								"Attach to an existed player",
+								"Cancel",
+							}).
+							Show(text)
+
+						if selectedOption == "Create a new player" {
+							instance.AddPlayer(*entity.NewPlayer(p.Name))
+							pterm.Printfln("Creating player %s", p.Name)
+						} else if selectedOption == "Attach to an existed player" {
+							selectedPlayer, _ := pterm.
+								DefaultInteractiveSelect.
+								WithOptions(players).
+								Show("Choose a player")
+							sp := instance.FindPlayer(selectedPlayer)
+							if sp == nil {
+								errorMessageAndExit("Find player failed:", selectedPlayer)
+							}
+							sp.AddAlias(p.Name)
+							res := instance.SetPlayer(sp)
+							if res == nil {
+								errorMessageAndExit("Attach player failed", selectedPlayer)
+							} else {
+								pterm.Printfln("Attaching alias %s to player %s", p.Name, sp.Name)
+							}
+						} else {
+							errorMessageAndExit("Cancelled")
+						}
 					}
 				}
 			}
diff --git a/internal/app/conf.go b/internal/app/conf.go
index d90671e..b69bd13 100644
--- a/internal/app/conf.go
+++ b/internal/app/conf.go
@@ -16,9 +16,16 @@ const DefaultName = ".kicker.yaml"
 type Conf struct {
 	ManifestVersion string `yaml:"manifest_version"`
 
+	// Settings
+	// NoColors bool `yaml:"no_colors"`
+
+	// Organization
 	Organization entity.Organization `yaml:"organization"`
 
-	Events  []entity.Event  `yaml:"events"`
+	// Events
+	Events []entity.Event `yaml:"events"`
+
+	// Players
 	Players []entity.Player `yaml:"players"`
 }
 
@@ -94,6 +101,29 @@ func (app App) GetPlayer(id string) *entity.Player {
 	return nil
 }
 
+// SetPlayer sets player data with the given id.
+func (app App) SetPlayer(player *entity.Player) *entity.Player {
+	for idx, p := range app.Conf.Players {
+		if player.ID == p.ID {
+			app.Conf.Players[idx] = *player
+			return &p
+		}
+	}
+
+	return nil
+}
+
+// FindPlayer returns player with the given name
+func (app App) FindPlayer(name string) *entity.Player {
+	for _, p := range app.Conf.Players {
+		if name == p.Name {
+			return &p
+		}
+	}
+
+	return nil
+}
+
 // DeletePlayer delete a player
 func (app *App) DeletePlayer(id string) error {
 	s := -1
diff --git a/internal/converter/converter.go b/internal/converter/converter.go
index 015f224..1389e5f 100644
--- a/internal/converter/converter.go
+++ b/internal/converter/converter.go
@@ -174,7 +174,7 @@ func (c *Converter) playerRank(
 					// remove third from fourth level
 					fourthPos := lastPos - 1
 					for i, p := range c.record.Ranks[fourthPos] {
-						if p.ID == third[0].ID {
+						if len(third) > 0 && p.ID == third[0].ID {
 							ranks := c.record.Ranks[fourthPos]
 							ranks = append(ranks[:i], ranks[i+1:]...)
 							c.record.Ranks[fourthPos] = ranks